Safety device for jointers



Sept. 16 1924. 1,508,685

A. FLOHR SAFETY DEVICE FOR JOINTERS Filed Oct. 20, 1923 /3 8 9 Afidrezu70k l 1 .1 V gin maniac Patented Sept. 16, 1924.

UNITED STATES ANDREW FLOHR, OF COLORADO SPRINGS, GOLQRADO.

SAFETY DEVICE FOR JOIN'TERS.

Application filed October 20, 192 3. Serial No. 669,732.

To all whom it may concern.

Be it known that I, ANDREW FLOHR, a citizen of the United States,residing at Colorado Springs, county of El Faso, and

State of Colorado, have invented certain new and useful Improvements inSafety Devices for J ointers; and I do declare the following to be afull, clear, and exact description of the invention, such as will'enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying draw: ings, and to thecharacters of reference marked thereon, which form a part of. thisspecification. v

This invention relates to safety devices for jointers. y

In wood-working establishments, the jointer is an indispensable machineand is universally employed. On account of its construction, the jointermust be handled with great care, as the slightest thoughtlessness islikely to result in a serious accident. The cutter, which revolves athigh speed, is exposed and a finger or even an entire hand can readilybe removed thereby in an instant.

It is the object of this invention to produce a guard or shield whichwill automatically move to closed position when the jointer is not beingused, and which will yield to the introduction of the material to beworked upon. It is a further object of this invention to produce a guardthat can be readily removed when the jointer is to be employed forcutting rabbets and which can furthermore be held in partly or fullyopen position.

y invention, briefly described, consists of a shield or guard platepivotall'y connected to the outer edge of the front section of the tableand acted upon by a spring that holds it normally in such a positionthat it covers the cutter. The guard is so constructed that when a pieceof timber is inserted between it and the guide wall of the jointertable, the guard will yield and uncover so much of the cutter as may benecessary for the particular operation. When the timber is withdrawn,the guard moves back into protective position.

In order better and more fully to describe my invention, I shall ha erefer e to the accompanying drawing in which the same is shown in itspresent preferred embodiment, and. in which:

Fig. 1 is apers'pective view of a jointer showing my protective devicein place thereon; I I

, Fig.2 is a top plan view of the jointer and indicates by dotted linesthe partly open position of the guard; y I f Fig. 3 is a section takenon line 33, Fig. 2; and i i Fig. 4 is a section taken on line 4 '4,

The same reference characters will be usedto designate the same partsthrough out the several views. i y

. Numeral 1 represents the base of a jointer and 2 the rotary cutterwhose shaft 3 is j ournaled in the bearing4. vThe jointer has al t topor table which is formed of a part 5 that usually remains, stationary,and a part 6 that ean'be adjustedina vertical direction by means notshown; Along the rear ofthe tables is a guide wall 7. I claim nothingnew in the construction of the jointer and have therefore merely shownthesame conventionally in order to properly define my. invention.

Secured to thefront edgeof the table sec tion 6 is a casing 8 that haslugs 9 and 10 which are perforated for the reception of holding bolts11. Casing 8 has a cylindrical opening within which is located a spiralspring 12, the outer end 13 of which is anchored in a suitable slot inthe wall of the casing. The inner end of the spring is connected to ahollow tubular member 131 whose lower end 14 is journaled in an openingin the bottom of the casing. A cover 15 screws into the open end of thecasing and is pro-' vided with a central opening whose diameter issubstantially equal to the diagonal of the square opening in tubularmember 131. The 0 ening in the cover 15 is counterbored for t ereception of the upper end of the tubular member. The guard or shieldconsists of a piece of sheet metal 16 whose shape is best understood bya referenceto- Figs. 1 and 2, and which may be roughly described asbeing convex along one side and end and concave along the other side,the end con; neeting the curved sides being straight. The uard is s r eeet upwa d indicated by numeral 17 so as to giveit rigidity. Thestraight side is bent downwardly as indicated by numeral 18. At thecurved end of the plate thereis secured a downwardly extending squarepin 19 whose tion "shown dotted in Fig. 2' and evento a greater extentif necessary. The guard is so designed that it can be rotated so tarthatthe ent e Wi h o he table is xpps d- In order to hold the guardinopen position, I have provided a series of holes 20' along the convexside for the reception of a bolt or pin, which cooperates with the sideof the table t'o'hold theguard i'n'open position. i

The flange. 18 serves to space the guard a given distance from theta bletop and prevents shavings from being thrown out by the action ofthecutter. i

[When the jointer is to be used for cutting r'abbets, the guard isremoved from the casing 8, but the latter may remain in place as it willnot interfere with the proper functioning'of the machine. 1

From the above description, taken in connection with the drawing, itwill be apparent that I have produced a simple and efficient guard forjointers which will automatically keep the unused portion of the cuttercovered and which can be held in'open position, if for any reason thisis desirable, and which furthermore can readily be removed when tubularmember, sheet metal guard plate having a non-clrcular pin "secured nearone end for cooperating with'the tubular me ber, sa d g a d me e aving a901 -ly cu d-s d a nge long-"S d see a d n rdly x end ng" flange at itse end Y i '2 A g a d ap d bobs s ured tea jointer table for covering thecutter, said guard comprising in con binationa cyliii drical casingprovided with lugs on its outer surface for the reception of securingbolta'a tubular member rotatab'ly mounted'in-said casing, a spiralspring in said casing-the outer end of the spring being secured to thecasing and the inner end being secured to the tubular member, asheetmetal guard plate having a non-circular pinfsecuredfi ear one end forcooperating with the tubular member, said guard member having aconvexlycurved side, a flangelajlong said convex. side, and adownwardlyextending flange "at its free end, said guard memberbeingprovided with a plurality of openingslalongits convex side for thereception of apin i In testimony whereof I affix my signature.

ANDREW FLOHR.

